License

Upgrade is free to install and use, including for commercial work — but it isn't open source. The license below covers exactly what that means: what you can do, and what's reserved.

The short version: use it for anything, including making money with programs you write in it. What you can't do is copy, redistribute, modify, or reverse-engineer the Upgrade software itself. Programs you write using Upgrade are entirely yours, under whatever terms you choose — this license only covers the language and its tooling, not your code.

UPGRADE LICENSE AGREEMENT

Copyright (c) 2026 Caleb. All rights reserved.

Upgrade (the "Software") is proprietary software. It is provided free
of charge for use under the terms below.

1. GRANT OF USE
   You are granted a free, non-exclusive, non-transferable license to
   install and use the Software for any purpose, including commercial
   use of programs you write in it.

2. RESTRICTIONS
   You may NOT, without prior written permission from the copyright
   holder:
   - Copy, distribute, sublicense, sell, rent, or lease the Software
     itself (as opposed to programs you write using it, which are
     entirely yours).
   - Modify, reverse engineer, decompile, disassemble, or otherwise
     attempt to derive the source code of the Software, except to the
     limited extent such restriction is expressly prohibited by
     applicable law notwithstanding this limitation.
   - Remove or alter any copyright, trademark, or other proprietary
     notices contained in the Software.

3. PROGRAMS YOU WRITE
   This license applies only to the Software (the Upgrade language,
   its interpreter, IDE, and standard library). It does not apply to,
   and the copyright holder claims no rights over, any program you
   write using Upgrade. Those are entirely yours, under whatever terms
   you choose.

4. NO WARRANTY
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
   NONINFRINGEMENT.

5. LIMITATION OF LIABILITY
   IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM,
   DAMAGES, OR OTHER LIABILITY ARISING FROM, OUT OF, OR IN CONNECTION
   WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

6. CHANGES
   This license may be updated in future versions of the Software.
   Continuing to use a given version of the Software means you accept
   the license that shipped with that version.